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《Chemistry》 2007-12
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Monolayer Dispersion Thresholds and Threshold Effect Displayed by Supported Catalysts

Deng Cun(Department of Chemistry,Ningde Teachers College,Ningde 352100)  
Principles of the spontaneous monolayer distribution holds that the active component of many supported catalysts will disperse spontaneously onto the surface of the carrier.The monolayer dispersion thresholds of the active component on the surface of the carrier can be measured by X-ray diffraction phase-quantitative extrapolation method,etc.By measuring the monolayer dispersion thresholds,the information of surface structure and dispersion of supported catalysts can be got,and the optimal preparative processing conditions of the catalysts can be elected.The proportioning of the active component of many supported catalysts can be optimized while its monolayer dispersion thresholds are observed.Mutation values of many physicochemical properties of supported catalysts are related to the monolayer dispersion thresholds,the threshold effect on catalysts is obvious,and the proposal of the threshold effect provides an instruction for the research of catalysts.
【CateGory Index】: O643.3
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